I worked for a guy that had a 2.1 trio of Boelens pythons and they truly are awesome animals. Super easy to work with(so long size doesnt bother you) and very aware of thats going on around them.

I like GTPs as well but something about the colors that come off of them that make them amazing.

and yes impossible to breed. We were working on a few different ideas before he was offered good money for his and sold them. I would be curious as to what you are trying.